Improvement in furnaces for brick-kilns



UNITED STATES PATENT OFFICE.

WILLIAM S. GOLWELL, OF PITTSBUBG, PENNSYLVANIA.

VIWIPRVEMENT IN FURNACES FOR BRICK-KILNS.

Specification forming part of Letters Patent No. 166,749, dated August A17, 1875; application filed May 19, 1875.

OASE o.

To all whom it may concern:

Be it known that I, WILLIAM S. CoLwELL, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Furnaces for Brick- Kilns and other things; and l do hereby declare that the-following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference markedvthereon.

My invention relates to an improvement in furnaces for brick-kilns and other purposes; and consists in providing the furnaces with a flame and heat chamber, spreaders, distrib uting-liues, and air-distributers, so constructed and arranged with relation to the nre-chamber of the furnace that cold air in contradistinction to hot air is distributed in jets forming counter-currents to the currents of the ilame and heat in their passage to the firearches of the kiln. My invention also consists 1n providing the hinges of the furnace-doors with eccentrics for raising the doors, so as to admit the desired current of air under their lower edge, and over the upper surface of the bed of fire on the furnace-grate.

To enable others skilled in the art to makeV and use my invention, I will proceed to describe its construction and operation in the accompanying drawings, which form part of my specification.

Figure l is afront elevation of my improvement in furnace, when combined with a brickkiln. Fig. 2 is a transverse section at line y of Fig. 4, representing the crown removed. Fig. 3 is a side elevation of my improvement in furnaces for brick-kilns. Fig. i is a vertical section of thesame. Fig. 5 is a horizontal section of the same. Fig. 6 is a detailed view of the furnace-doors.

In the accompanying drawings, A represents an ordinary brick-kiln, the mouths ofthe fire-arches o of which are furnished with dampers 10, to which are secured notched rods or stems 1'. On the sides of the kilns A are secured projecting bars or ribs s for the notched rods or stems to catch on for the purpose of holding up the dampers p. The furnace B is provided with a flame and heat chamber, C,

spreaders D, and iiues J lc Z m, which communicate with lire-arches o of the kiln A. e and f are air-flues, which are provided with a large number of small openings, g and h. The openings 1 lead into the air-flue f, and the openings 2 lead into the air-flue e. The openings n are for the purpose of observing the condition and workin g of the furnace, and its chamber and dues. The pintles r for the hinges of the doors A' and B' are furnished with stops u and eccentrics t, which turn on the pintles 7". The ends of the eccentrics are beveled or furnished with inclines, and the pieces y and y have corresponding bevels or inclines. The pintles 1^' are secured in a fixed position in the pieces y', which are cast -on the front plate C of the furnace. The pieces y are loose on the pintles. By turning the eccentric t, its end acting on the inclines of the pieces y and y', will force the pieces y up against the hinges of the doors A and B', raising them up on the pintles r', as indicated by door A' in Figs. l and 6.

By this arrangement of the eccentrics t, and the parts connected therewith, the doors A and B' can be raised to any desired degree for admitting a current of air under them, and over the surface of the fire in the furnace. In the side walls of the furnace at the back end of the ash-pit, and under the grate, are openings D'. Experience has demonstrated that these openings D cause ,the fire on the back end of the grate -to burn much better, and instead of a dead body of fuel being at the back end of the grate next to the gratebars, which is usually the case, the fire will be bright and lively.-

The operation of my improvement is as follows: The iiame and heat of the furnace passing into the chamber (l, the cold air, in counterdistinction to heated air, passing frm the flues e j' through openings g and h will form a counter-current, which, acting against the ingoiug flame and heat, will cause complete combustion, and result in production of an intense heat, which, passing down into the dues J 7c lm, will enter/the fire-arches and from them distribute/through the kiln. By raising the doors A and B so that a currenty of air will pass under their lower edges, and over the fire in the furnace, it will make the combustion of the fuel more complete, adding much to the heat of the urnace. The operator, by lowering the dampers opposite ues m l, can direct the entire lame and heat of the furnace down through iues J lc, or by lowering the dampers opposite the ues J k the heat and flame will pass down through lines l m, or all the heat and flame may be directed down a single ue.

It will be readily seen that by the manipulation of the dampers 10 the heat may be distributed through the flues and through the kiln, as may be required, and at the pleasure of the operator.

Having thus described my improvement, what I claimas of m y invention isl. The furnace B, provided with chamber C,

spreader D, and flues J k lm, and air-fluese f, with openings g h, substantially'as herein described.

2. The furnace B,having chamber C, spreaders D, flues J lo l m, air-ilues e f, with openings g h, in combination with the dempers p and tire-arches o, substantially as herein described, and for the purpose set forth.

3. The doors A' B', provided with pintles r', having eccentrics t, pieces y y', and stops u, in combination with the furnace B, Whereby the doors are adjustable for admitting a current of air under them and over the re in the furnace, substantially as and for the purpose hereinbefore described and set forth.

W. S. GOLWELL.

Witnesses:

FRANCIS TORRAN 0E, N. B. HATCH. 

